The effects of the kind of green-foaming agent and the special catalyst on the structure and property of polyurethane foam for the building thermal insulation had been studied in this thesis.Research results showed that the match between the gelatinizing rate and the foaming rate would be adjusted by specific catalyst,and then the structure and property of polyurethane foam could be controlled in this way.The results also indicated that the kind of foaming agent could affect the structure and property of polyurethane foam.